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Rose hips

Supplement botanical immunebone & joint
Aka: Rosa canina
Brands seen in Singapore: California Gold Nutrition, Solaray, Swanson, Vitacost, 21st Century
Not medical advice. Check with your doctor or pharmacist before you start, stop or change the timing of anything you take.
How to use
What it’s for
Joint pain in osteoarthritis trials — results are mixed
Studied for
The danish trial ran 12 weeks on a tapering amount
Pros & cons
Pros
  • Vitamin C is its highest vitamin, with a, b and e too
  • 2019 review: placebo-controlled RCTS, well tolerated
  • Only the active group showed a dose-per-kg gradient
Cons
  • 2026 re-analysis: no group difference in womac scores
  • Placebo improved over 50% in that SAMe trial
  • The 2019 review is mechanistic, not a pooled effect
Sources
  1. Rosa canina — Rose hip pharmacological ingredients and molecular mechanics counteracting osteoarthritis: a systematic review (Gruenwald et al., Phytomedicine 2019) · read 2026-08-27
    what it says
    “Several randomized placebo controlled double-blind studies, as mono or combination therapy, have demonstrated treatment efficacy as well as excellent tolerability. … This review focuses on the molecular mechanism underlying the clinical effects of rose hip in osteoarthritis”
  2. Using Dose-Response Correlation Re-Analyzing to Distinguish Placebo from Standardized Rose-Hip Powder (Lito) in a Clinical Trial on Osteoarthritis (Motawei, Warholm & Winther, Nutrients 2026; re-analysis of NCT01459939, N=120) · read 2026-08-27
    what it says
    “Both groups showed significant improvement, over 50%, with no statistically significant differences between them in WOMAC pain or function. However, only the active group … exhibited a consistent negative correlation between body weight and symptom improvement”
  3. Unveiling the mechanisms for the development of rosehip-based dermatological products: an updated review (Front Pharmacol 2024) · read 2026-08-27
    what it says
    “Rosehip is a storehouse of vitamins, including A, B complex, C, and E. Among phytonutrients, vitamin C is found in the highest amount.”
  4. HSA — Health Supplements Guidelines, Rev. No. 020 (January 2026), Table 4: Vitamins Limits · read 2026-08-27
    what it says
    “HS for use by the general adult population should not contain vitamins and minerals exceeding the stipulated limits stated in Tables 4 and 5. … Vitamin C — 1000mg”
  5. HSA — Guidelines on Prohibited and Restricted Ingredients in Health Supplements and Traditional Medicines, Version 1 (Oct 2025), Annex A (72 rows) and Annex B (4 rows: caffeine, green tea extract, St John's wort, L-tryptophan) — read from the cached PDF text on disk · read 2026-08-27
    what it says
    “The objective of this guideline is to highlight the substances of concern when used in HS and TM and is not meant to be an exhaustive list.”
  6. HSA — Health Supplements Guidelines, Rev. No. 020 (January 2026), Table 6: diseases/conditions not allowed for health supplements · read 2026-08-27
    what it says
    “HS must not be labelled, advertised or promoted for any specific medicinal purpose, i.e. treatment or prevention, implied or otherwise, of any disease or disorder, including its related conditions.”
  7. iHerb Singapore — Rose Hips category (default order, 1 - 32 of 32 results) · read 2026-08-27
    what it says
    “California Gold Nutrition, Total C Complex with Ascorbic Acid, Amla Extract, Citrus Bioflavonoids & Rose Hip Extract, 500 mg … Solaray, Timed Release Vitamin C with Rose Hip & Acerola, 1,000 mg … Swanson Vitamins, C-1000, Vitamin C With Rose Hips … Vitacost, Everyday, Vitamin C, 1,000 mg … 21st Century, Vitamin C with Rose Hips”
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Updated 2026-08-29. Every line above traces to a numbered source. Kozen-X is not a medical device and does not give medical advice. It lists what published sources have written down — nothing more. A pair not listed is unrecorded, not cleared. Before you start, stop or re-time anything, talk to your doctor or pharmacist.